Omron LY4N 24VDC 4-Pole Socketed Relay: Technical Guide, Applications and Installation
When a machine has to run 24/7, component selection is not about saving a few euros on the BOM — it is about selecting items that will not become a production problem. The Omron LY4N 24VDC 4-Pole Socketed Relay (24V DC) is designed precisely for that reality, with multi-channel signal switching at the top of its application list.
Omron’s product range extends well beyond relays and switches. The company’s Omron Sensor portfolio covers inductive, photoelectric, and capacitive detection technologies — often integrated into the same panel alongside units like this one, creating a fully cohesive control system.
About the Omron LY4N 24VDC 4-Pole Socketed Relay
The Omron LY4N 24VDC is a 4-Pole Socketed Relay rated at 24V DC, built to handle multi-channel signal switching reliably over a long service life. Key engineering features include arc barrier, transparent cover, multi-pole switching, and the unit mounts via socket + din rail.
The engineering case for the Omron LY4N 24VDC 4-Pole Socketed Relay rests on a clear set of advantages: arc barrier, transparent cover, multi-pole switching. Operating voltage of 24V DC slots neatly into most European and global panel designs.
Specifications at a Glance
The table below summarises the main technical parameters of the Omron LY4N 24VDC. For full specifications, always refer to the official Omron product datasheet, as application-specific derating may apply.
| Parameter | Value |
|---|---|
| Product Type | 4-Pole Socketed Relay |
| Coil / Operating Voltage | 24V DC |
| Contacts / Channels | 4-pole (4PDT) |
| Contact Current | 5 A |
| Key Features | Arc barrier, transparent cover, multi-pole switching |
| Mounting | Socket + DIN rail |
| Mechanical Lifetime | 50 million mechanical operations |
| Operating Temperature | -25 °C to +70 °C |
| Compatible Socket | PF113A / PTF11A |
Industry Use Cases
The Omron LY4N 24VDC 4-Pole Socketed Relay is commonly specified for the following applications:
- Multi-channel signal switching
- Plc interface panels
- Automation cabinets
Across these use cases, the consistent thread is a need for dependable switching over a large number of operations, often in environments where an unplanned fault would create significant disruption. The Omron LY4N 24VDC is designed with exactly those conditions in mind.
The Omron LY4N 24VDC is designed to be used with PF113A / PTF11A. Using a non-compatible socket model can compromise contact pressure and reduce overall service life, so always verify socket compatibility before ordering.
Installation Checklist
A few installation details make a tangible difference with the Omron LY4N 24VDC 4-Pole Socketed Relay. Using the correct Omron socket eliminates contact resistance mismatch. Leaving adequate clearance around the unit supports thermal dissipation in dense panel layouts. And ensuring terminal screw torque is within spec prevents the kind of creeping resistance that causes intermittent faults months later.
For ongoing maintenance, periodically inspect for contact discolouration, check terminal screws for loosening, and look for any signs of heat stress on the housing. Catching these early avoids the much larger cost of an unplanned production stop.
Omron LY4N 24VDC: Long-Term Value
Omron’s reputation in automation did not come from clever advertising. It came from decades of components performing reliably in factories, warehouses, and process plants around the world. The LY4N 24VDC 4-Pole Socketed Relay is a current embodiment of that engineering culture — nothing superfluous, nothing compromised.
Frequently Asked Questions
How do I install the Omron LY4N 24VDC?
Mount the Omron LY4N 24VDC 4-Pole Socketed Relay on a 35 mm DIN rail using the compatible socket or directly as specified. De-energise the circuit before installation, connect cables at the rated cross-section, and tighten terminal screws to the torque values stated in the datasheet.
What is the electrical lifespan of the Omron LY4N 24VDC?
Electrical lifespan depends on switching frequency and load type. At rated resistive load, Omron relay products typically achieve several hundred thousand to over a million operations. The exact figure for the Omron LY4N 24VDC is stated in its technical datasheet.
Can the Omron LY4N 24VDC switch inductive loads?
Yes, but inductive loads reduce contact lifespan due to higher arc energy at switch-off. For frequent inductive switching with the Omron LY4N 24VDC 4-Pole Socketed Relay, a suppression device — such as a varistor or RC snubber — is recommended across the load.
Is the Omron LY4N 24VDC RoHS compliant?
Omron products conform to the RoHS Directive requirements. Specific compliance documentation for the Omron LY4N 24VDC can be requested from your authorised Omron distributor.
What should I check during periodic maintenance of the Omron LY4N 24VDC?
Inspect contact surfaces for pitting or discolouration, check terminal screws for loosening (particularly in high-vibration environments), and verify that the housing shows no thermal discolouration. Replace the unit if any of these signs are present.